Routing security
AS204033 sarthur Oliver Arthur
Unclassified RIPE
Announcements
What this network originates
Every prefix observed with AS204033 as its origin, checked against RPKI and the IRR. Problems sort first.
| Prefix | RPKI | IRR | Vantage points |
|---|---|---|---|
| 2a13:3d00:fff5::/48 | RPKI valid | IRR | 29 |
| 176.126.127.0/24 | RPKI valid | IRR | 52 |
| 185.20.7.0/24 | RPKI valid | IRR | 52 |
RPKI · ROAs
Route origin authorisations
Signed statements by address holders that AS204033 may originate these prefixes, up to the maximum length shown.
| Prefix | Max length | Trust anchor |
|---|---|---|
| 176.126.127.0/24 | /24 | RIPENCC |
| 185.20.7.0/24 | /24 | RIPENCC |
| 2a13:3d00:fff5::/48 | /48 | RIPENCC |
ROA-based and RPKI-valid-only prefix lists for routers are on asn.ipinfo.app.
RPKI · ASPA
Declared transit providers
This network has signed an ASPA record naming its transit providers. Each is compared against the upstreams observed in routing paths.
| AS | Network | ASPA | Routing paths |
|---|---|---|---|
| AS34872 | Sarah Rossius trading as Servperso Systems | Declared | not observed |
| AS58057 | Securebit AG | Declared | not observed |
| AS47447 | 23M GmbH | not declared | Observed |
| AS212895 | Johannes Ernst | not declared | Observed |
An observed upstream that is not declared is not necessarily a leak: our upstream inference cannot tell a transit provider from a peer seen in the same position. A declared provider that is never observed is usually a backup path.
IRR
Registered route objects
Route objects naming AS204033 as origin, across RADb, the RIR registries, ALTDB and NTTCOM. Objects that are registered but not announced come first: a stale object lets anyone who can spoof this origin through an IRR-built filter.
| Prefix | Source | Description | Maintainer | Changed | Routing |
|---|---|---|---|---|---|
| 176.126.127.0/24 | RIPE | — | LIR-DE-SASCHA1-1-MNT | 2026-03-05 | Announced |
| 185.20.7.0/24 | RIPE | — | LIR-DE-SASCHA1-1-MNT | 2026-03-05 | Announced |
| 2a13:3d00:fff5::/48 | RIPE | — | LIR-DE-SASCHA1-1-MNT | 2024-02-13 | Announced |
IRR
AS-sets
The as-set is what upstreams expand to build this network's customer filter. Sets that list AS204033 directly show who expects to carry it.
| AS-set | Where | Relationship |
|---|---|---|
AS-IFOG | ALTDB | Lists AS204033 as a direct member |
AS-IFOG | RIPE | Lists AS204033 as a direct member |
AS-IILYO | RIPE | Lists AS204033 as a direct member |
AS-LAN-ADVICE | RIPE | Lists AS204033 as a direct member |
AS-RETN-ACTUAL-V4 | RIPE | Lists AS204033 as a direct member |
AS-VM-JE-CUS | RIPE | Lists AS204033 as a direct member |
AS204033:AS-OARTHUR | RIPE | Lists AS204033 as a direct member |
AS204033:AS-SARTHUR | RIPE | Lists AS204033 as a direct member |
AS52025:AS-DOWNSTREAMS-AMSTERDAM | RIPE | Lists AS204033 as a direct member |
AS52025:AS-DOWNSTREAMS-ASHBURN | RIPE | Lists AS204033 as a direct member |
AS52025:AS-DOWNSTREAMS-AUCKLAND | RIPE | Lists AS204033 as a direct member |
AS52025:AS-DOWNSTREAMS-FRANKFURT | RIPE | Lists AS204033 as a direct member |
AS52025:AS-DOWNSTREAMS-FREMONT | RIPE | Lists AS204033 as a direct member |
AS52025:AS-DOWNSTREAMS-KANSASCITY | RIPE | Lists AS204033 as a direct member |
AS52025:AS-DOWNSTREAMS-NEWARK | RIPE | Lists AS204033 as a direct member |
AS52025:AS-DOWNSTREAMS-SINGAPORE | RIPE | Lists AS204033 as a direct member |
AS52025:AS-DOWNSTREAMS-STOCKHOLM | RIPE | Lists AS204033 as a direct member |
AS52025:AS-DOWNSTREAMS-SYDNEY | RIPE | Lists AS204033 as a direct member |
AS52025:AS-DOWNSTREAMS-TOKYO | RIPE | Lists AS204033 as a direct member |
AS52025:AS-DOWNSTREAMS-TORONTO | RIPE | Lists AS204033 as a direct member |
RPKI from rpki-client, validated 2026-11-02 13:01 UTC. IRR from ARIN, RADB, RIPE, ALTDB, APNIC, LACNIC, NTTCOM, AFRINIC, collected 2026-11-02. Cross-check on bgp.he.net.